Professor, Dr. Bai Yundevoted to the civil engineering in China, Singapore, India, Vietnam，Thailand and other countries for twenty eight years. His experience covers many fields of civil engineering such as elevated expressways, MRT project (tunnels and stations),Water treatment facilities, water tunnels, road tunnels, river and sea bridges, soil improvement, rock Caverns and tunnels, site instrumentation, structural test, pile foundation, etc. As an author and co-author, he published more than seventy papers. He also published more than ten books as an author, co-author and editor member. He is a deputy editor/an editorial board member of four technical magazines (three are local and one is international). He is a former Vice President of International Tunneling Association and ias an executive member of China Civil Engineering Society and a vice chairman of Shanghai Society of Civil Engineering, Professor, Dr. Bai Yun always pays his great enthusiasm for promoting the exchange and cooperation in civil engineering between Chinaand other countries.He organized and chaired many international and regional technical exchanges.